Tài liệu tham khảo WikiPedia: Natri_azua http://books.google.com/?id=25avFCpfQAcC&pg=PA123&... http://www.jtbaker.com/msds/englishhtml/s2906.htm http://www.straightdope.com/columns/061117.html http://books.nap.edu/openbook.php?record_id=4911&p... http://chemapps.stolaf.edu/jmol/jmol.php?model=%5B... http://www.cdc.gov/niosh/npg/npgd0560.html //pubmed.ncbi.nlm.nih.gov/16560767 //www.ncbi.nlm.nih.gov/pmc/articles/PMC373901 http://ecb.jrc.it/ http://ecb.jrc.it/esis/index.php?GENRE=ECNO&ENTREE...
